In Newton-Raphson iterative method, the initial guess value $\left(x_{\mathrm{ini}}\right)$ is considered as zero while finding the roots of the equation: $f(x)=-2+6 x-4 x^{2}+0.5 x^{3}$. The correction, $\Delta x$, to be added to $x_{\text {ini }}$ in the first iteration is
In Newton-Raphson iterative method, the initial guess value $\left(x_{\mathrm{ini}}\right)$ is considered as zero while finding the roots of the equation: $f(x)=-2+6 x-4 x^{2}+0.5 x^{3}$. The correction, $\Delta x$, to be added to $x_{\text {ini }}$ in the first iteration is